39-GP-31a
This standard applies to surface plates of igneous rock (granite) for use in
precision locating, layout and inspection work. It encompasses new
certification, recertification in the field and recertification after
resurfacing.
SDO:
CGSB
Language:
English
ICS Codes:
17.040.30
Status:
Withdrawn
Publish date:
1993-02-27
Standard Number:
39-GP-31a